-tachi~

makes things plural, but this only works for pronouns. ("Watashi-tachi" - 'we')

taichou~

captain

taiyo

ocean

taki~

waterfall

taki-bi~

bonfire

Tamashii-Satsujinhan'nin~

Soul-Killer

tani(-ma)~

valley

tantei~

detective

teiki~

periodic

teikoku~

imperial

temee~

you (A VERY rough way of saying that; the best English equivilent would be "you &*@#!^ bastard!!!" And it's used very often by Yuusuke and Kuwabara, sometimes towards each other...)

to~

and

toge~

spike, thorn

tokubetsu(no)~

special

tomo/tomodachi~

friend

tora~

tiger

toshi~

age

tori~

bird

tsubomi~

flower bud

tsuki~

moon

tsuki-sashimasu~

stabs

tsukiyo~

moonlight

tsumi~

sin

tsumuji-kaze~

whirlwind

tsunagi~

a link

tsuno~

horn

tsurara~

icicle

tsurenai~

coldhearted; cruel

tsurugi~

sword

tsuta

ivy

tsuyu~

dew